Nasreddine Bencherchali
76 lines
2.4 KiB
YAML
76 lines
2.4 KiB
YAML
title: HAFNIUM Exchange Exploitation Activity
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id: bbb2dedd-a0e3-46ab-ba6c-6c82ae7a9aa7
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status: test
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description: Detects activity observed by different researchers to be HAFNIUM group activity (or related) on Exchange servers
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references:
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- https://blog.truesec.com/2021/03/07/exchange-zero-day-proxylogon-and-hafnium/
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- https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/
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- https://discuss.elastic.co/t/detection-and-response-for-hafnium-activity/266289/3
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- https://twitter.com/GadixCRK/status/1369313704869834753?s=20
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- https://twitter.com/BleepinComputer/status/1372218235949617161
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author: Florian Roth (Nextron Systems)
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date: 2021/03/09
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modified: 2023/03/09
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tags:
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- attack.persistence
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- attack.t1546
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- attack.t1053
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logsource:
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category: process_creation
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product: windows
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detection:
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selection_attrib:
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CommandLine|contains|all:
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- 'attrib'
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- ' +h '
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- ' +s '
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- ' +r '
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- '.aspx'
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selection_vsperfmon:
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- Image|contains: '\ProgramData\VSPerfMon\'
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- CommandLine|contains|all:
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- 'schtasks'
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- 'VSPerfMon'
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selection_opera_1:
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Image|endswith: 'Opera_browser.exe'
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ParentImage|endswith:
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- '\services.exe'
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- '\svchost.exe'
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selection_opera_2:
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Image|endswith: 'Users\Public\opera\Opera_browser.exe'
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selection_vssadmin:
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CommandLine|contains|all:
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- 'vssadmin list shadows'
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- 'Temp\__output'
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selection_makecab_1:
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Image|endswith: '\makecab.exe'
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CommandLine|contains|all:
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- 'inetpub\wwwroot\'
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- '.dmp.zip'
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selection_makecab_2:
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Image|endswith: '\makecab.exe'
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CommandLine|contains:
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- 'Microsoft\Exchange Server\'
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- 'compressionmemory'
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- '.gif'
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selection_7zip:
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CommandLine|contains|all:
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- ' -t7z '
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- 'C:\Programdata\pst'
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- '\it.zip'
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selection_rundll32:
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CommandLine|contains|all:
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- '\comsvcs.dll'
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- 'Minidump'
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- 'full '
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- '\inetpub\wwwroot'
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selection_other:
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CommandLine|contains:
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- 'Windows\Temp\xx.bat'
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- 'Windows\WwanSvcdcs'
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- 'Windows\Temp\cw.exe'
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condition: 1 of selection*
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falsepositives:
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- Unlikely
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level: critical
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